Tractor



FIG. 1 is a front view of a tractor, showing our new design;

FIG. 2 is a rear view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is an upper left rear perspective view thereof;

FIG. 7 is another front view thereof;

FIG. 8 is another rear view thereof;

FIG. 9 is another left side view thereof;

FIG. 10 is another right side view thereof; and,

FIG. 11 is another top view thereof.

The portions of the tractor illustrated in gray in FIGS. 7-11 are transparent surfaces.

A bottom view is omitted because it is plain and unornamental and forms no part of the subject matter of the claimed design. 

CLAIM The ornamental design for a tractor, as shown and described. 